Welcome to Thunderbird Add-ons.
Add extra features and styles to make Thunderbird your own.Tutup
Rated 4 out of 5 stars
Very nice theme, but it need a litte more tweak for users with "tab on top" option turned on for FF4.
If you use tab on top + maximize the Windows, there seems to a little space between the top of the screen and the tab-bar. Such that you need to move 2-3 pixel down in order to select the tab, unlike the default theme.
Correction will be included in 1.6.4.